Agreed, especially regarding the culture but isn't this pretty much the same explanation they gave a few years ago when something similar happened?

I seem to recall an EC2 or S3 outage a few years ago that boiled down to an engineer pushing out a patch that broke an entire region when it was supposed to be a phased deployment.

I could be mis-remembering that but it's important that these lessons be applied across the whole company (at least AWS) so it would be a bigger mark against AWS if this is a result of similar tooling to what caused a previous outage.